Smoothing down the copper traces with a guitar pick. Take this Christmas tree for example, which uses a 555 timer and a CB4017 decade counter in order to drive some blinking LEDs.

Crafts Christmas Craft: Stained Glass Tissue Paper Shapes For Your Tree Or Window By Jackie Currie, Happy Hooligans Dec 10, 2020 ...

When you are done, just roll a small piece of brown paper and stick it at the bottom of the tree as a stem, picture 16. Paste beads on the edges of the twigs, and finally a star on top of the tree.